UBUNTU-CVE-2025-38477: Use After Free

Q: What level of access does an attacker need to exploit this issue?

The vulnerability is locally exploitable and requires low privileges. User interaction is not required, but the attack complexity is rated high and an additional attack-condition requirement is indicated.

Q: Which Ubuntu kernel package variants are listed as affected?

The listed packages are ubuntu/linux, ubuntu/linux-aws, ubuntu/linux-azure, ubuntu/linux-gcp, ubuntu/linux-fips, ubuntu/linux-aws-fips, ubuntu/linux-azure-fips, and ubuntu/linux-gcp-fips.

Q: What security impact could successful exploitation have?

The severity vector indicates high impact to confidentiality, integrity, and availability of the vulnerable system. No impact to a separate security authority is indicated.

Published Jul 28, 2025

Updated

In the Linux kernel, the following vulnerability has been resolved: net/sched: schqfq: Fix race condition on qfqaggregate A race condition can occur when 'agg' is modified in qfqchangeagg (called during qfqenqueue) while other threads access it concurrently. For example, qfqdumpclass may trigger a NULL dereference, and qfqdeleteclass may cause a use-after-free. This patch addresses the issue by: 1. Moved qfqdestroyclass into the critical section. 2. Added schtreelock protection to qfqdumpclass and qfqdumpclassstats.

Affected Software

222 affected componentsFixes available

ubuntu/linux*

ubuntu/linux-aws*

ubuntu/linux-azure<4.15.0-1193.208~14.04.1

4.15.0-1193.208~14.04.1

ubuntu/linux-lts-xenial*

ubuntu/linux-aws-hwe<4.15.0-1185.198~16.04.1

4.15.0-1185.198~16.04.1

ubuntu/linux-azure<4.15.0-1193.208~16.04.1

4.15.0-1193.208~16.04.1

ubuntu/linux-gcp<4.15.0-1178.195~16.04.1

4.15.0-1178.195~16.04.1

ubuntu/linux-hwe<4.15.0-242.254~16.04.1

4.15.0-242.254~16.04.1

ubuntu/linux-oracle<4.15.0-1148.159~16.04.1

4.15.0-1148.159~16.04.1

ubuntu/linux*

ubuntu/linux-aws*

ubuntu/linux-hwe-edge*

ubuntu/linux-kvm*

ubuntu/linux-fips*

ubuntu/linux<4.15.0-242.254

4.15.0-242.254

ubuntu/linux-aws<4.15.0-1185.198

4.15.0-1185.198

ubuntu/linux-aws-5.0*

ubuntu/linux-aws-5.3*

ubuntu/linux-aws-5.4<5.4.0-1151.161~18.04.1

5.4.0-1151.161~18.04.1

ubuntu/linux-azure*

ubuntu/linux-azure-4.15<4.15.0-1193.208

4.15.0-1193.208

ubuntu/linux-azure-5.3*

ubuntu/linux-azure-5.4<5.4.0-1154.161~18.04.1

5.4.0-1154.161~18.04.1

ubuntu/linux-azure-edge*

ubuntu/linux-gcp*

ubuntu/linux-gcp-4.15<4.15.0-1178.195

4.15.0-1178.195

ubuntu/linux-gcp-5.3*

ubuntu/linux-gcp-5.4<5.4.0-1154.163~18.04.1

5.4.0-1154.163~18.04.1

ubuntu/linux-gke-4.15*

ubuntu/linux-gke-5.4*

ubuntu/linux-gkeop-5.4*

ubuntu/linux-hwe*

ubuntu/linux-hwe-5.4<5.4.0-222.242~18.04.1

5.4.0-222.242~18.04.1

ubuntu/linux-hwe-edge*

ubuntu/linux-ibm-5.4<5.4.0-1097.102~18.04.1

5.4.0-1097.102~18.04.1

ubuntu/linux-kvm<4.15.0-1168.173

4.15.0-1168.173

ubuntu/linux-oem*

ubuntu/linux-oracle<4.15.0-1147.158

4.15.0-1147.158

ubuntu/linux-oracle-5.0*

ubuntu/linux-oracle-5.3*

ubuntu/linux-oracle-5.4<5.4.0-1149.159~18.04.1

5.4.0-1149.159~18.04.1

ubuntu/linux-raspi-5.4<5.4.0-1134.147~18.04.1

5.4.0-1134.147~18.04.1

ubuntu/linux-aws-fips<4.15.0-2123.129

4.15.0-2123.129

ubuntu/linux-azure-fips<4.15.0-2102.108

4.15.0-2102.108

ubuntu/linux-fips<4.15.0-1140.151

4.15.0-1140.151

ubuntu/linux-gcp-fips<4.15.0-2086.92

4.15.0-2086.92

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux<5.4.0-222.242

5.4.0-222.242

ubuntu/linux-aws<5.4.0-1151.161

5.4.0-1151.161

ubuntu/linux-aws-5.11*

ubuntu/linux-aws-5.13*

ubuntu/linux-aws-5.15<5.15.0-1093.100~20.04.1

5.15.0-1093.100~20.04.1

ubuntu/linux-aws-5.8*

ubuntu/linux-azure<5.4.0-1154.161

5.4.0-1154.161

ubuntu/linux-azure-5.11*

ubuntu/linux-azure-5.13*

ubuntu/linux-azure-5.15<5.15.0-1097.106~20.04.1

5.15.0-1097.106~20.04.1

ubuntu/linux-azure-5.8*

ubuntu/linux-azure-fde*

ubuntu/linux-bluefield<5.4.0-1110.117

5.4.0-1110.117

ubuntu/linux-gcp<5.4.0-1154.163

5.4.0-1154.163

ubuntu/linux-gcp-5.11*

ubuntu/linux-gcp-5.13*

ubuntu/linux-gcp-5.15<5.15.0-1093.102~20.04.1

5.15.0-1093.102~20.04.1

ubuntu/linux-gcp-5.8*

ubuntu/linux-gke*

ubuntu/linux-gke-5.15*

ubuntu/linux-gkeop*

ubuntu/linux-gkeop-5.15*

ubuntu/linux-hwe-5.11*

ubuntu/linux-hwe-5.13*

ubuntu/linux-hwe-5.15<5.15.0-157.167~20.04.1

5.15.0-157.167~20.04.1

ubuntu/linux-hwe-5.8*

ubuntu/linux-ibm<5.4.0-1097.102

5.4.0-1097.102

ubuntu/linux-ibm-5.15<5.15.0-1087.90~20.04.1

5.15.0-1087.90~20.04.1

ubuntu/linux-intel-5.13*

ubuntu/linux-intel-iotg-5.15<5.15.0-1088.94~20.04.1

5.15.0-1088.94~20.04.1

ubuntu/linux-iot<5.4.0-1055.58

5.4.0-1055.58

ubuntu/linux-kvm<5.4.0-1138.147

5.4.0-1138.147

ubuntu/linux-lowlatency-hwe-5.15<5.15.0-157.167~20.04.1

5.15.0-157.167~20.04.1

ubuntu/linux-nvidia-tegra-5.15<5.15.0-1046.46~20.04.1

5.15.0-1046.46~20.04.1

ubuntu/linux-oem-5.10*

ubuntu/linux-oem-5.13*

ubuntu/linux-oem-5.6*

ubuntu/linux-oracle<5.4.0-1149.159

5.4.0-1149.159

ubuntu/linux-oracle-5.11*

ubuntu/linux-oracle-5.13*

ubuntu/linux-oracle-5.15<5.15.0-1091.97~20.04.1

5.15.0-1091.97~20.04.1

ubuntu/linux-oracle-5.8*

ubuntu/linux-raspi<5.4.0-1134.147

5.4.0-1134.147

ubuntu/linux-raspi2*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.11*

ubuntu/linux-riscv-5.15<5.15.0-1088.92~20.04.1

5.15.0-1088.92~20.04.1

ubuntu/linux-riscv-5.8*

ubuntu/linux-xilinx-zynqmp<5.4.0-1069.73

5.4.0-1069.73

ubuntu/linux-aws-fips<5.4.0-1151.161+fips1

5.4.0-1151.161+fips1

ubuntu/linux-azure-fips<5.4.0-1155.162+fips1

5.4.0-1155.162+fips1

ubuntu/linux-fips<5.4.0-1125.135

5.4.0-1125.135

ubuntu/linux-gcp-fips<5.4.0-1154.163+fips1

5.4.0-1154.163+fips1

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux<5.15.0-157.167

5.15.0-157.167

ubuntu/linux-allwinner-5.19*

ubuntu/linux-aws<5.15.0-1093.100

5.15.0-1093.100

ubuntu/linux-aws-5.19*

ubuntu/linux-aws-6.2*

ubuntu/linux-aws-6.5*

ubuntu/linux-aws-6.8<6.8.0-1040.42~22.04.1

6.8.0-1040.42~22.04.1

ubuntu/linux-azure<5.15.0-1097.106

5.15.0-1097.106

ubuntu/linux-azure-5.19*

ubuntu/linux-azure-6.2*

ubuntu/linux-azure-6.5*

ubuntu/linux-azure-6.8<6.8.0-1040.46~22.04.1

6.8.0-1040.46~22.04.1

ubuntu/linux-azure-fde<5.15.0-1098.107.1

5.15.0-1098.107.1

ubuntu/linux-azure-fde-5.19*

ubuntu/linux-azure-fde-6.2*

ubuntu/linux-gcp<5.15.0-1093.102

5.15.0-1093.102

ubuntu/linux-gcp-5.19*

ubuntu/linux-gcp-6.2*

ubuntu/linux-gcp-6.5*

ubuntu/linux-gcp-6.8<6.8.0-1041.43~22.04.1

6.8.0-1041.43~22.04.1

ubuntu/linux-gke<5.15.0-1090.96

5.15.0-1090.96

ubuntu/linux-gkeop<5.15.0-1076.84

5.15.0-1076.84

ubuntu/linux-hwe-5.19*

ubuntu/linux-hwe-6.2*

ubuntu/linux-hwe-6.5*

ubuntu/linux-hwe-6.8<6.8.0-85.85~22.04.1

6.8.0-85.85~22.04.1

ubuntu/linux-ibm<5.15.0-1087.90

5.15.0-1087.90

ubuntu/linux-ibm-6.8<6.8.0-1038.38~22.04.1

6.8.0-1038.38~22.04.1

ubuntu/linux-intel-iot-realtime*

ubuntu/linux-intel-iotg<5.15.0-1088.94

5.15.0-1088.94

ubuntu/linux-kvm<5.15.0-1089.94

5.15.0-1089.94

ubuntu/linux-lowlatency<5.15.0-157.167

5.15.0-157.167

ubuntu/linux-lowlatency-hwe-5.19*

ubuntu/linux-lowlatency-hwe-6.2*

ubuntu/linux-lowlatency-hwe-6.5*

ubuntu/linux-lowlatency-hwe-6.8<6.8.0-85.85.1~22.04.1

6.8.0-85.85.1~22.04.1

ubuntu/linux-nvidia<5.15.0-1088.89

5.15.0-1088.89

ubuntu/linux-nvidia-6.2*

ubuntu/linux-nvidia-6.5*

ubuntu/linux-nvidia-6.8<6.8.0-1040.43~22.04.1

6.8.0-1040.43~22.04.1

ubuntu/linux-nvidia-tegra<5.15.0-1046.46

5.15.0-1046.46

ubuntu/linux-nvidia-tegra-igx<5.15.0-1035.35

5.15.0-1035.35

ubuntu/linux-oem-5.17*

ubuntu/linux-oem-6.0*

ubuntu/linux-oem-6.1*

ubuntu/linux-oem-6.5*

ubuntu/linux-oracle<5.15.0-1091.97

5.15.0-1091.97

ubuntu/linux-oracle-6.5*

ubuntu/linux-oracle-6.8<6.8.0-1037.38~22.04.1

6.8.0-1037.38~22.04.1

ubuntu/linux-raspi<5.15.0-1087.90

5.15.0-1087.90

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.19*

ubuntu/linux-riscv-6.5*

ubuntu/linux-riscv-6.8<6.8.0-86.87~22.04.1

6.8.0-86.87~22.04.1

ubuntu/linux-starfive-5.19*

ubuntu/linux-starfive-6.2*

ubuntu/linux-starfive-6.5*

ubuntu/linux-xilinx-zynqmp<5.15.0-1057.61

5.15.0-1057.61

ubuntu/linux-bluefield<5.15.0-1077.79

5.15.0-1077.79

ubuntu/linux-intel-iot-realtime<5.15.0-1086.88

5.15.0-1086.88

ubuntu/linux-realtime<5.15.0-1093.102

5.15.0-1093.102

ubuntu/linux-realtime-6.8<6.8.1-1035.36~22.04.1

6.8.1-1035.36~22.04.1

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux-aws-fips<5.15.0-1093.100+fips1

5.15.0-1093.100+fips1

ubuntu/linux-azure-fips<5.15.0-1097.106+fips1

5.15.0-1097.106+fips1

ubuntu/linux-fips<5.15.0-157.167+fips1

5.15.0-157.167+fips1

ubuntu/linux-gcp-fips<5.15.0-1093.102+fips1

5.15.0-1093.102+fips1

ubuntu/linux<6.8.0-85.85

6.8.0-85.85

ubuntu/linux-aws<6.8.0-1040.42

6.8.0-1040.42

ubuntu/linux-aws-6.14<6.14.0-1014.14~24.04.1

6.14.0-1014.14~24.04.1

ubuntu/linux-azure<6.8.0-1040.46

6.8.0-1040.46

ubuntu/linux-azure-6.11*

ubuntu/linux-azure-6.14<6.14.0-1013.13~24.04.1

6.14.0-1013.13~24.04.1

ubuntu/linux-azure-nvidia<6.8.0-1025.27

6.8.0-1025.27

ubuntu/linux-azure-nvidia-6.14<6.14.0-1007.7

6.14.0-1007.7

ubuntu/linux-gcp<6.8.0-1041.43

6.8.0-1041.43

ubuntu/linux-gcp-6.11*

ubuntu/linux-gcp-6.14<6.14.0-1017.18~24.04.1

6.14.0-1017.18~24.04.1

ubuntu/linux-gke<6.8.0-1037.41

6.8.0-1037.41

ubuntu/linux-gkeop<6.8.0-1024.26

6.8.0-1024.26

ubuntu/linux-hwe-6.11*

ubuntu/linux-ibm<6.8.0-1038.38

6.8.0-1038.38

ubuntu/linux-intel*

ubuntu/linux-lowlatency<6.8.0-85.85.1

6.8.0-85.85.1

ubuntu/linux-lowlatency-hwe-6.11*

ubuntu/linux-nvidia<6.8.0-1040.43

6.8.0-1040.43

ubuntu/linux-nvidia-6.11*

ubuntu/linux-nvidia-lowlatency<6.8.0-1040.43.1

6.8.0-1040.43.1

ubuntu/linux-nvidia-tegra<6.8.0-1012.12

6.8.0-1012.12

ubuntu/linux-oem-6.11*

ubuntu/linux-oem-6.14<6.14.0-1013.13

6.14.0-1013.13

ubuntu/linux-oem-6.8*

ubuntu/linux-oracle<6.8.0-1037.38

6.8.0-1037.38

ubuntu/linux-oracle-6.14<6.14.0-1014.14~24.04.1

6.14.0-1014.14~24.04.1

ubuntu/linux-raspi<6.8.0-1040.44

6.8.0-1040.44

ubuntu/linux-raspi-realtime*

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-riscv-6.14<6.14.0-33.33.1~24.04.1

6.14.0-33.33.1~24.04.1

ubuntu/linux-xilinx<6.8.0-1018.19

6.8.0-1018.19

ubuntu/linux-bluefield<6.8.0-1012.16

6.8.0-1012.16

ubuntu/linux-raspi-realtime<6.8.0-2031.32

6.8.0-2031.32

ubuntu/linux-realtime<6.8.1-1035.36

6.8.1-1035.36

ubuntu/linux-realtime-6.14<6.14.0-1013.13~24.04.1

6.14.0-1013.13~24.04.1

ubuntu/linux-aws-fips<6.8.0-1040.42+fips1

6.8.0-1040.42+fips1

ubuntu/linux-azure-fips<6.8.0-1040.46+fips1

6.8.0-1040.46+fips1

ubuntu/linux-fips<6.8.0-85.85+fips1

6.8.0-85.85+fips1

ubuntu/linux-gcp-fips<6.8.0-1041.43+fips1

6.8.0-1041.43+fips1

ubuntu/linux-azure-fde*

ubuntu/linux-vmware*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 4.15.0-1193.208~14.04.1
Upgrade
Upgrade ubuntu/linux-aws-hwe to a version that resolves this vulnerability.
Fixed in 4.15.0-1185.198~16.04.1
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 4.15.0-1193.208~16.04.1
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 4.15.0-1178.195~16.04.1
Upgrade
Upgrade ubuntu/linux-hwe to a version that resolves this vulnerability.
Fixed in 4.15.0-242.254~16.04.1
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 4.15.0-1148.159~16.04.1
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 4.15.0-242.254
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 4.15.0-1185.198
Upgrade
Upgrade ubuntu/linux-aws-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1151.161~18.04.1
Upgrade
Upgrade ubuntu/linux-azure-4.15 to a version that resolves this vulnerability.
Fixed in 4.15.0-1193.208
Upgrade
Upgrade ubuntu/linux-azure-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1154.161~18.04.1
Upgrade
Upgrade ubuntu/linux-gcp-4.15 to a version that resolves this vulnerability.
Fixed in 4.15.0-1178.195
Upgrade
Upgrade ubuntu/linux-gcp-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1154.163~18.04.1
Upgrade
Upgrade ubuntu/linux-hwe-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-222.242~18.04.1
Upgrade
Upgrade ubuntu/linux-ibm-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1097.102~18.04.1
Upgrade
Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 4.15.0-1168.173
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 4.15.0-1147.158
Upgrade
Upgrade ubuntu/linux-oracle-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1149.159~18.04.1
Upgrade
Upgrade ubuntu/linux-raspi-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1134.147~18.04.1
Upgrade
Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-2123.129
Upgrade
Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-2102.108
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-1140.151
Upgrade
Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-2086.92
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 5.4.0-222.242
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 5.4.0-1151.161
Upgrade
Upgrade ubuntu/linux-aws-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1093.100~20.04.1
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 5.4.0-1154.161
Upgrade
Upgrade ubuntu/linux-azure-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1097.106~20.04.1
Upgrade
Upgrade ubuntu/linux-bluefield to a version that resolves this vulnerability.
Fixed in 5.4.0-1110.117
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 5.4.0-1154.163
Upgrade
Upgrade ubuntu/linux-gcp-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1093.102~20.04.1
Upgrade
Upgrade ubuntu/linux-hwe-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-157.167~20.04.1
Upgrade
Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.
Fixed in 5.4.0-1097.102
Upgrade
Upgrade ubuntu/linux-ibm-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1087.90~20.04.1
Upgrade
Upgrade ubuntu/linux-intel-iotg-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1088.94~20.04.1
Upgrade
Upgrade ubuntu/linux-iot to a version that resolves this vulnerability.
Fixed in 5.4.0-1055.58
Upgrade
Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 5.4.0-1138.147
Upgrade
Upgrade ubuntu/linux-lowlatency-hwe-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-157.167~20.04.1
Upgrade
Upgrade ubuntu/linux-nvidia-tegra-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1046.46~20.04.1
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 5.4.0-1149.159
Upgrade
Upgrade ubuntu/linux-oracle-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1091.97~20.04.1
Upgrade
Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.
Fixed in 5.4.0-1134.147
Upgrade
Upgrade ubuntu/linux-riscv-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1088.92~20.04.1
Upgrade
Upgrade ubuntu/linux-xilinx-zynqmp to a version that resolves this vulnerability.
Fixed in 5.4.0-1069.73
Upgrade
Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1151.161+fips1
Upgrade
Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1155.162+fips1
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1125.135
Upgrade
Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1154.163+fips1
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 5.15.0-157.167
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 5.15.0-1093.100
Upgrade
Upgrade ubuntu/linux-aws-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1040.42~22.04.1
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 5.15.0-1097.106
Upgrade
Upgrade ubuntu/linux-azure-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1040.46~22.04.1
Upgrade
Upgrade ubuntu/linux-azure-fde to a version that resolves this vulnerability.
Fixed in 5.15.0-1098.107.1
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 5.15.0-1093.102
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Upgrade ubuntu/linux-gcp-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1041.43~22.04.1
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Fixed in 5.15.0-1090.96
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Fixed in 5.15.0-1076.84
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Fixed in 6.8.0-85.85~22.04.1
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Fixed in 5.15.0-1087.90
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Fixed in 6.8.0-1038.38~22.04.1
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Fixed in 5.15.0-1088.94
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Fixed in 5.15.0-1089.94
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Fixed in 5.15.0-157.167
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Fixed in 6.8.0-85.85.1~22.04.1
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Fixed in 5.15.0-1088.89
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Fixed in 6.8.0-1040.43~22.04.1
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Fixed in 5.15.0-1046.46
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Fixed in 5.15.0-1035.35
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Fixed in 5.15.0-1091.97
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Fixed in 6.8.0-1037.38~22.04.1
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Fixed in 5.15.0-1087.90
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Fixed in 6.8.0-86.87~22.04.1
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Fixed in 5.15.0-1057.61
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Fixed in 5.15.0-1077.79
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Fixed in 5.15.0-1086.88
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Fixed in 5.15.0-1093.102
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Fixed in 6.8.1-1035.36~22.04.1
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Fixed in 5.15.0-1093.100+fips1
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Fixed in 5.15.0-1097.106+fips1
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Fixed in 5.15.0-157.167+fips1
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Fixed in 5.15.0-1093.102+fips1
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Fixed in 6.8.0-85.85
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Fixed in 6.8.0-1040.42
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Fixed in 6.14.0-1014.14~24.04.1
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Fixed in 6.8.0-1040.46
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Fixed in 6.14.0-1013.13~24.04.1
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Fixed in 6.8.0-1025.27
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Fixed in 6.14.0-1007.7
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Fixed in 6.8.0-1041.43
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Fixed in 6.14.0-1017.18~24.04.1
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Fixed in 6.8.0-1037.41
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Fixed in 6.8.0-1024.26
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Fixed in 6.8.0-1038.38
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Fixed in 6.8.0-85.85.1
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Fixed in 6.8.0-1040.43
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Fixed in 6.8.0-1040.43.1
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Fixed in 6.8.0-1012.12
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Fixed in 6.14.0-1013.13
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Fixed in 6.8.0-1037.38
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Fixed in 6.14.0-1014.14~24.04.1
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Fixed in 6.8.0-1040.44
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Fixed in 6.14.0-33.33.1~24.04.1
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Fixed in 6.8.0-1018.19
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Fixed in 6.8.0-1012.16
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Fixed in 6.8.0-2031.32
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Fixed in 6.8.1-1035.36
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Fixed in 6.14.0-1013.13~24.04.1
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Fixed in 6.8.0-1040.42+fips1
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Fixed in 6.8.0-1040.46+fips1
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Fixed in 6.8.0-85.85+fips1
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Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.
Fixed in 6.8.0-1041.43+fips1

Event History

Jul 28, 2025

CVE Published

via OSV·12:15 PM

Data Sourced

via OSV·12:15 PM

DescriptionSeverityAffected Software

Frequently Asked Questions

What level of access does an attacker need to exploit this issue?

The vulnerability is locally exploitable and requires low privileges. User interaction is not required, but the attack complexity is rated high and an additional attack-condition requirement is indicated.

Which Ubuntu kernel package variants are listed as affected?

The listed packages are ubuntu/linux, ubuntu/linux-aws, ubuntu/linux-azure, ubuntu/linux-gcp, ubuntu/linux-fips, ubuntu/linux-aws-fips, ubuntu/linux-azure-fips, and ubuntu/linux-gcp-fips.

What security impact could successful exploitation have?

The severity vector indicates high impact to confidentiality, integrity, and availability of the vulnerable system. No impact to a separate security authority is indicated.

UBUNTU-CVE-2025-38477: Use After Free

Affected Software

Remediation

Event History

Frequently Asked Questions

What level of access does an attacker need to exploit this issue?

Which Ubuntu kernel package variants are listed as affected?

What security impact could successful exploitation have?

Company

Resources

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Frequently Asked Questions

What level of access does an attacker need to exploit this issue?

Which Ubuntu kernel package variants are listed as affected?

What security impact could successful exploitation have?